Some changes I did for my ClojureC REPL project#34

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bertfrees wants to merge 5 commits intoschani:masterfrom

Commits on Jan 12, 2014

read-string must be the responsibility of read-exports-fn
bertfrees
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Remember which vars are already defined and declare them as `extern`
bertfrees
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Commits on Jan 16, 2014

Make Closure printable
Bert Frees
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Commits on Jan 17, 2014

New type: cljc.core.Var
bertfrees
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Commits on Jan 18, 2014

Support regular expression literals
bertfrees
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